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DMRS-based channel estimation for railway communications in tunnel environments

机译:隧道环境中铁路通信的基于DMRS的信道估计

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The aim of this paper is to address the Demodulation Reference Signal (DMRS) based channel estimation issue in railway tunnel scenarios. Thus, we propose a deterministic model to accurately generate the time-varying channel response. And to investigate the impact of these particular environments on a Cyclic-Prefix Orthogonal Frequency Division Multiplexing (CP-OFDM) system, we first explore the pilot patterns proposed in the 5G specification, then we apply a thresholding based channel estimation algorithm to extract the demodulated data symbols. By comparing the Bit Error Rate (BER) and the latency of seven slot configurations at different train speeds, the results allow us to make some recommendations depending on the intended railway application and the required Quality of Service (QoS) level. (C) 2021 Elsevier Inc. All rights reserved.
机译:本文的目的是在铁路隧道场景中解决基于解调参考信号(DMRS)的信道估计问题。 因此,我们提出了一种确定性模型来准确地产生时变信道响应。 为了调查这些特定环境对循环前缀正交频分复用(CP-OFDM)系统的影响,我们首先探索在5G规范中提出的导频模式,然后我们应用基于阈值的信道估计算法来提取解调的 数据符号。 通过比较误码率(BER)和七个时隙配置的不同列车速度,结果允许我们根据预定的铁路应用和所需的服务质量(QoS)水平进行一些建议。 (c)2021 Elsevier Inc.保留所有权利。

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